JP2530399Y2 - Abnormal displacement detection mechanism in electromagnetic vibration type diaphragm air pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an electromagnetic vibration type diaphragm air pump.

(Prior Art) FIG. 3 is a sectional view schematically showing an electromagnetic vibration type diaphragm air pump.

Diaphragms 8L, 8R are attached to the mounting tables 7L, 7R provided on both sides of the casing 1 so as to face each other. Are formed, and the pump chambers RL and RR are formed by the diaphragms 8L and 8R and the cover casings 2L and 2R, respectively. 5L, 5R, 6L, and 6R are check valves that open and close the suction holes 3LI and 3RI and the discharge holes 4LO and 4RO, respectively.

The drive rod 9 is provided with a permanent magnet 10 and both ends thereof are connected and fixed to the diaphragms 8L and 8R.

Electromagnets 11 ₁ and 11 ₂ are arranged on the outer periphery of the permanent magnet 10,
The electromagnets 11 ₁ and 11 ₂ include cores 11 ₁₁ and 11 ₂₁ and coils 11 ₁₂ and 11 ₂₂ .

In such an electromagnetic vibratory diaphragm air pump, the electromagnet 11 _1, 11 ₂ into AC of a predetermined frequency is supplied, the permanent magnet 10 and the electromagnet 11 _1, 11 driving rod 9 by ₂ interactions reciprocating right and left Move. Therefore, as shown by the arrows, the air flows in through the suction holes 3LI, 3RI, passes through the pump chambers RL, RR, and then flows out from the discharge holes 4LO, 4RO.

When the above-mentioned electromagnetic vibration type diaphragm type air pump is used for a long time, the diaphragm 8 supporting the driving rod 9 can be used.
When the L and 8R are damaged, the driving rod 9 and the permanent magnet 10 provided on the driving rod 9 come into contact with the electromagnets 11 ₁ and 11 ₂ ,
The electromagnets 11 ₁ and 11 ₂ may be damaged, or the permanent magnet 10 may be damaged and scattered.

Therefore, when the diaphragms 8L, 8R are damaged, the driving rod 9 and the permanent magnet 10 approach one of the diaphragms 8L, 8R and vibrate including the movement of the driving rod 9 in a direction other than the axial direction. When an abnormal displacement exceeding the permissible range of normal reciprocation is performed, a switch opened by the projection of the drive rod 9 is provided on the electromagnet 11 ₁ or 11 _2.
The switch when abnormal displacement open at the protrusion is stopped, the drive rod 9, the permanent magnet 10 and the electromagnet 11 _1, 11 ₂ is damaged, and prevent damage.

(Problems to be Solved by the Invention) In the conventional electromagnetic vibration type diaphragm air pump as described above, the displacement of the drive rod provided with the permanent magnet increases due to the phase of the current flowing through the electromagnet when the power is turned on. In some cases, the conventional configuration cannot distinguish between the overshoot based on the initial vibration and the abnormal displacement due to the damage of the diaphragm, and has a disadvantage that the displacement of the driving rod at the time of startup opens the switch. ing.

In addition, the abnormal displacement detecting means including the protrusion and the switch in the conventional configuration is of a type for detecting the displacement of the reciprocating motion, and the reciprocating motion includes various vibrations including the initial vibration when the power is turned on as described above. It varied depending on conditions (hardness of the diaphragm, tension, aging, differences in power supply frequencies of 50 Hz and 60 Hz, differences in voltage, variations in parts, etc.), making it difficult to set a reliable detection position.

The present invention detects a displacement based on a damage to a diaphragm as a displacement in a direction orthogonal to a reciprocating motion of a driving rod. At this time, a configuration in which a permanent magnet provided on the driving rod can be used for the detection is used. Can be operated more reliably, and the driving rod due to the damage of the diaphragm,
An object of the present invention is to provide an electromagnetic vibration type diaphragm air pump that can prevent breakage and damage of permanent magnets and electromagnets.

(Means for Solving the Problems) According to the present invention, in order to achieve the above object, pump chambers are provided on both sides, and each of diaphragms constituting a part of the pump chamber has a driving rod having a permanent magnet. In an electromagnetic vibration type diaphragm air pump in which both ends are fixed and an electromagnet is arranged on the outer periphery of the permanent magnet, an abnormal displacement detection member having a breakable conductive pattern connected to a power supply circuit for the electromagnet is provided. A protruding piece portion provided in a passage area of a permanent magnet in a core portion adjacent to the outside, wherein the abnormal displacement detecting member has a notch that is contact-ruptured by displacement in a direction orthogonal to reciprocating motion of a permanent magnet provided on a driving rod. Is formed.

According to the configuration of the present invention, in the electromagnetic vibration type diaphragm type air pump, when the diaphragm is broken during operation, a displacement occurs in a direction orthogonal to the reciprocation of the drive rod, and the displacement is caused by the permanent magnet of the drive rod passing through the passage. The abnormal displacement detecting section of the detecting plate located at the position is contacted, the abnormal displacement detecting section is broken together with the power supply circuit by this contact, the power supply to the electromagnet is cut off, and the air pump stops.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The abnormal displacement detecting mechanism of the present invention can be applied to the electromagnetic vibration type diaphragm type air pump shown in FIG. 3 described in the section of the prior art.

FIG. 1 shows an embodiment of the abnormal displacement detection mechanism of the present invention.

The end positions of the electromagnets 11 ₁ and 11 ₂ , that is, the coils 11 ₁₂ and 11
The core 11 _11, 11 ₂₁ portion adjacent the outer side of the _22, abnormal deviation detection member 12 is attached by fixing means such as screws.

The abnormal displacement detection member 12 is formed of a plate body that is easily broken like a bakelite plate, and one end is connected to the power supply side on the surface of the plate body, and the other end is connected to the coil side of the electromagnets 11 ₁ and 11 _2. Rushirubeden pattern 12 ₁ is formed. The shape of the abnormal displacement detecting member 12 is such that when the permanent magnet 10 formed on the driving rod 9 is reciprocated in the X direction due to the damage of the diaphragm, and further displaced in the Y direction orthogonal to the reciprocating motion in the X direction. To
In order to detect the displacement in the Y direction, projecting pieces 12 ₂ , 12 as an abnormal displacement detecting portion which protrude into the passage of the permanent magnet 10 more than the electromagnet and come into contact with the permanent magnet 10 and can be broken. _Two
It has. The projecting pieces 12 ₂ , 12 ₂ correspond to the Y of the permanent magnet 10.
To break the displacement in the direction easily performed, to form a 12 _3, 12 ₃ cuts the root of the protruding portions 12 _2, 12 _2.
The breakage of the protruding portions 12 _2, 12 _2, so that the conductive pattern 12 ₁ is cut, a portion of the conductive pattern 12 ₁ is projected pieces, 1
It is formed so as to be located in 2 _2, 12 ₂ each.

In such an embodiment of the present invention, if the diaphragm is damaged during the operation of the air pump, the driving rod 9 moves with the state where the center position of the reciprocation in the X direction is biased toward one of the diaphragms. Will occur.

In this case, Y-direction of the side surface of the permanent magnet 10 provided on the driving rod 9 before contacting the electromagnet 11 _1, 11 ₂ side, electromagnets 11 _1, 1
Projection piece 12 of abnormal displacement detection member 12 arranged close to 1 _2
2, 12 in contact with the _second one of the inner surface, the protruding portions 12 ₂ in contact is bent broken by cuts 12 _3, the conductive pattern 12 ₁ with the broken even be disconnected, the current to the electromagnet 11 _1, 11 ₂ Supply cut off. Thus, reciprocation of the drive rod 9 is stopped, the drive rod 9, the permanent magnet 10, an electromagnet 11 _1, 11 ₂ of the damage, it is possible to prevent damage.

Figure 2 is another embodiment of the present invention the abnormal deviation detecting mechanism, and the embodiment of Figure 1, abnormal deviation detection protrusion portion 12 ₄ formed member 12, 12 ₄ shape differences I do.

In this embodiment, the projecting pieces 12 ₄ , 12 ₄ are set to Y when the drive rod 9 provided with the permanent magnet 10 is shifted to the left or right in the X direction and reciprocates in the X direction. deformation at the end face of the permanent magnet 10 which is displaced in the direction, a shape suitable for breaking, this is the protruding portions 12 _4, 12 ₄ to form a notch 12 _5, 12 ₅ in the horizontal direction, the displacement of the reciprocating direction It will break.

As an embodiment of the present invention, the case where the abnormal displacement detecting member is provided on one side of the air pump has been described, but by arranging symmetrically on both sides of the air pump, it is possible to accurately detect the abnormality of the diaphragm. is there.

(Effect) By providing the abnormal displacement detection mechanism shown in the present invention to the electromagnetic vibration type diaphragm air pump, the number of components is orthogonal to the reciprocating motion of the driving rod, which is caused by the damage of the diaphragm during the operation of the air pump. The movement in the direction is detected as an abnormal displacement, and furthermore, the detection of the abnormal displacement interrupts the current supply to the electromagnet, thereby preventing the drive rod, the permanent magnet and the electromagnet from being damaged or damaged.

[Brief description of the drawings]

1 is a plan view of an embodiment of the abnormal displacement detecting mechanism of the present invention, FIG. 2 is a plan view of an embodiment different from FIG. 1 of the present invention, and FIG. 3 is a known electromagnetic vibration to which the present invention is applied. It is a schematic sectional view of a mold diaphragm type air pump. 9 ... drive rod, 10 ... permanent magnet, 11 ₁ , 11 ₂ ... electromagnet, 1
2 …… Abnormal displacement detection member, 12 ₁ …… Conductive pattern, 12 ₂ , 12
₄ …… Abnormal displacement detector.

Claims (1)

(57) [Scope of request for utility model registration] 1. A pump chamber is provided on both sides, and both ends of a driving rod having a permanent magnet are fixed to each of the diaphragms constituting a part of the pump chamber, and an electromagnet is arranged on the outer periphery of the permanent magnet. In the electromagnetic vibration type diaphragm type air pump, an abnormal displacement detection member having a breakable conductive pattern connected to a power supply circuit for an electromagnet is provided in a passage area of a permanent magnet in a core portion adjacent to the outside of the coil, The abnormal displacement detecting member has a protruding portion provided with a cutout which is broken by contact in a direction orthogonal to the reciprocating motion of the permanent magnet provided on the driving rod, characterized by an abnormality in the electromagnetic vibration type diaphragm air pump. Displacement detection mechanism.